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Richard Ernst, père de l IRM et Nobel de chimie en 1991, est mort
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Le professeur Richard Ernst est décédé
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The climate crisis is already eating into the output of the world’s agricultural systems, with productivity much lower than it would have been if humans hadn’t rapidly heated the planet, new research has found.
Advances in technology, fertilizer use and global trade have allowed food production to keep pace with a booming global population since the 1960s, albeit with gross inequities that still leave millions of people suffering from malnutrition.
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But rising temperatures in this time have acted as a handbrake to farming productivity of crops and livestock, according to the new research, published in Nature Climate Change. Productivity has actually slumped by 21 per cent since 1961, compared to if the world hadn’t been subjected to human-induced heating.
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The study looked at production in terms of inputs, including labor, fertilizer, machinery, and the output in terms of food. It used a model to see how climate change has affected this relationship.
Although farming has become much more productive in recent decades, heatwaves are becoming increasingly threatened, which fatigues farm workers and cause some crops to wilt. Drought and severe weather events may also affect a farm s production, particularly in poorer countries.
Via degradation of pasture land, depletion of fertile topsoil, chemical emissions, and the emission of large quantities of greenhouse gases that lead to global warming, the intensification of farming to increase productivity has caused significant environmental harm.
Advances in technology, fertilizer use and global trade have allowed food production to keep pace with a booming global population since the 1960s, albeit with gross inequities that still leave millions of people suffering from malnutrition.
But rising temperatures in this time have acted as a handbrake to farming productivity of crops and livestock, according to the new research, published in Nature Climate Change. Productivity has actually slumped by 21% since 1961, compared to if the world hadn’t been subjected to human-induced heating.
With the global population set to rise to more than 9 billion by 2050, the UN’s Food and Agriculture Organization has estimated that food production will have to increase by about 70%, with annual crop production increasing by almost one 1bn tonnes and meat production soaring by more than 200m tonnes a year by this point.
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